Abstract
Mangiferin-loaded nanobilosomes (MGF-NBSs) were developed using microfluidic-based techniques to improve aqueous solubility, digestive stability, and cellular antioxidant activity (CAA) of mangiferin. Preliminary experiments showed that optimal formation conditions were 5:1 aqueous (water) to solvent (ethanol) phase ratio and 85 mL/min total flow rate. Further optimization using response surface methodology provided the optimal formulation (200 mg encapsulant consisting of 90.91% phosphatidylcholine and 9.09% sodium glycocholate, and 25.89 mg mangiferin), achieving 9.25% mangiferin loading and 80.65% encapsulation efficiency. Mono-dispersed MGF-NBSs with an average size of around 48.14 nm and zeta potential of −30.1 mV were obtained. FTIR and DSC results confirmed the successful encapsulation of mangiferin into the nanobilosomes and revealed interactions among the components. MGF-NBSs showed a 7-fold increase in the aqueous solubility compared with non-encapsulated mangiferin. CAA of MGF-NBSs in Caco-2 cells was 2 times higher than that of mangiferin and the in vitro digestive stability was improved.
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